SEARCH Articles Figures Tables Applications of Diels-Alder Reactions Aqueous Diels-Alder reaction Aqueous aza-Diels-Alder reaction Aqueous ions Aqueous reactions Aza-Diels-Alder Aza-Diels-Alder reaction Diels aqueous Diels-Alder protonation Diels-Alder reaction synthetic applications Diels-Alder reaction, application Diels-Alder reactions simple Diels-Alder, synthetic applications Iminium ion Iminium ions reaction Of Diels-Alder reactions Proton applications Proton ions Proton reactions Protonated ions Protonation Reactions Reaction application Reaction of ions Reactions Involving Ions Simple Applications Simple ion Simple reaction Synthetic application of Diels-Alder Synthetic application of Diels-Alder reaction Synthetic applications Synthetic reactions The Proton